Innovations in Hydronic Heating

New European valves allow easy and economical room-by-room zoning

A thermostatic radiator valve (TRV) can control the temperature
at each radiator. The most common type has an operator with the
setpoint dial mounted directly onto the valve body (top). Also
available is a remote setpoint dial, which is connected to the valve
by a capillary tube (above).
INNOVATIONS
IN
HYDRONIC
HEATING
by John Siegenthaler
New European valves allow
easy and economical
room-by-room zoning
JLC ??MARCH 1992
Amodern "one-pipe" heating
system combines new control
technology with an old hydronic (hot
water) piping system. This system offers a
number of advantages over conventional
hydronic systems. In particular, it is
cheaper to create heating zones within a
building, and it is easier to control these
zones independently.
The heart of the new system is a